{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6628U","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"1N6628U","canonicalUrl":"https://icboms.com/microchip/1N6628U","factsUrl":"https://icboms.com/api/mcp/products/1N6628U","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology 1N6628U Fast Recovery Diode, Standard type, 660V Vr, 1.75A Io, 45ns trr, SQ-MELF B package, Surface Mount, Bulk.","salesMarkdown":"## Active production — what it means for a BOM line The 1N6628U: For a procurement desk, Active means the manufacturer continues to accept orders and the part is supported in the current BOM revision. ## 660 V, 1.75 A — the switching rectifier's duty envelope Rated for 660 V DC reverse voltage and 1.75 A average rectified current, this fast recovery diode handles the primary-side bulk rectification in off-line power supplies and DC-link snubbers where the reverse voltage stress sits above the 400 V bus. The 45 ns reverse recovery time (trr) classifies it as a fast recovery device per the JEDEC definition (trr ≤ 500 ns at Io > 200 mA) — the switching loss at 100 kHz is manageable in a continuous-conduction-mode boost or flyback topology. ## SQ-MELF B — surface-mount hermetic footprint The SQ-MELF B (Surface Mount MELF, B case) is a hermetic glass-passivated package suited for high-reliability and military/aerospace applications where moisture resistance and thermal cycling endurance are required. ## Junction temperature and leakage at the high-voltage rail Reverse leakage at 660 V is only 2 µA at 25°C — it doubles with temperature, so at 125°C junction the leakage contribution to the thermal budget should be checked against the derating curve. Capacitance is 40 pF at 10 V reverse bias and 1 MHz — this is low enough that the diode does not load the switching node significantly in a 100–500 kHz converter, but it contributes to the snubber design in high-voltage ringing circuits.","metaTitle":"Microchip 1N6628U Fast Recovery Diode, 660V, 1.75A, SQ-MELF","metaDescription":"Active production 1N6628U from Microchip Technology. 660V, 1.75A fast recovery rectifier with 45ns trr in SQ-MELF B package. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"Microchip Technology","Speed":"Fast Recovery =< 500ns, > 200mA (Io)","Series":"-","Package":"Bulk","Diode Type":"Standard","Mounting Type":"Surface Mount","Package / Case":"SQ-MELF, B","Product Status":"Active","lifecycle_stage":"eol_hot","Capacitance @ Vr, F":"40pF @ 10V, 1MHz","Supplier Device Package":"SQ-MELF, B","Reverse Recovery Time (trr)":"45 ns","Current - Reverse Leakage @ Vr":"2 µA @ 660 V","Voltage - DC Reverse (Vr) (Max)":"660 V","Current - Average Rectified (Io)":"1.75A","Operating Temperature - Junction":"-65°C~150°C","Voltage - Forward (Vf) (Max) @ If":"1.35 V @ 2 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$18.0000","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/75f1bd9fb9c8ecc2ace50c32fbeee4b4.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1N6628U/alternatives.json"},"ai":{"faq":[{"question":"What is the 1N6628U's reverse recovery time and what does it mean?","answer":"The 1N6628U has a 45 ns reverse recovery time (trr), classifying it as a fast recovery diode. This trr is low enough to keep switching losses manageable in 100 kHz+ power converters, making it suitable for flyback, boost, and half-bridge topologies where the diode must turn off quickly after forward conduction."},{"question":"What package does the 1N6628U come in?","answer":"The 1N6628U is supplied in a SQ-MELF B (Surface Mount MELF, B case) package. It is a hermetic glass-passivated surface-mount package, shipped in Bulk form."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/1N6628U","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/1N6628U when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}